I book a lot of hotels, probably about 100 nights per year for work and leisure. I have come to the conclusion that booking.com is by far inferior to the other hotel comparison sites. The main reason is that it doesn't advertise the true cost until the very last stage and only in the small print. I have just stayed at a hotel which initially looked good value, but there was then 15% added for vat, 4% for city tax, I had to pay for all electricity I used and wifi was also extra. I definitely could have got a better price if I had gone to another hotel which showed the true price in the original advert.